Sur le Genre Lennoa

Fournier, Eugène

doi:10.1080/00378941.1868.10825214

Bulletin de la Société Botanique de France

1868

DOI: 10.1080/00378941.1868.10825214

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Sur le Genre Lennoa

Eugène Fournier¹

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1967

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“…If Copeland's suggested phylogeny is true also with respect to pollen characteristics, the presence of sexine thinning in the meso colpia with resultant intercolpar sexine thinning depressions would be relatively advanced features. The change from essentially simplibaculate to duplibaculate muri and coarsening of the reticulum would then also be phylogenetic specializations, The pollen characteristics of the 3 genera are sufficiently different to support their recognition, although some authors (e.g., Fournier, 1868) thought Pholisma to be congeneric with Lennoa.…”

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Pollen Morphology of the Lennoaceae

Drugg¹

1962

American J of Botany

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Drugg, Warren S. (California Res. Corp., La Habra.) Pollen morphology of the Lennoaceae. Amer. Jour. Bot. 49(10): 1027–1032. Illus. 1962.—The family Lennoaceae contains 3 genera: Pholisma, Lennoa, and Ammobroma. The pollen of Pholisma is 4‐colporate with less common 3‐ and 5‐colporate grains. Lennoa pollen is 3‐colporate with rare 4‐colporate examples. All Ammobroma pollen is 3‐colporate. Pollen of both Lennoa and Ammobroma exhibits sexine thinning in the mesocolpia with resultant depressions. This feature is lacking in Pholisma. Sculpture is reticulate‐simplibaculate on pollen of Lennoa and Pholisma, and reticulate‐duplibaculate on pollen of Ammobroma. Pollen morphology supports placement of Lennoaceae in the Polemoniales near the Boraginaceae and Hydrophyllaceae.

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Pollen Morphology of the Lennoaceae

Drugg¹

1962

American J of Botany

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The Structure of the Flower of Pholisma Arenarium

Copeland

1935

American J of Botany

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Parasitism in Pholisma (Lennoaceae). I. External Morphology of Subterranean Organs

Kuijt

1966

American J of Botany

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The external features of the subterranean organs of coastal Californian Pholisma depressum Greene are described. A dimorphic root system exists. Long, stout roots (pilot roots) serve for vegetative propagation in reaching other host roots. Short, unbranching, more slender roots originating from the pilot roots are haustorial in function. Shoots seem to arise only on pilot roots. Host attachment is achieved through the direct transformation of the apical meristem of haustorial roots into the haustorial organ. The basal part of the shoot is also able to produce roots when near host roots, and may form lateral branch shoots either directly or after new haustorial connections are formed. Both types of roots arise endogenously. The invaded host root undergoes considerable hypertrophy. The intrusive organ itself forms a massive but irregular body. More than one haustorial root may enter even a small host root. Self parasitism may occur but is not common.

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Sur le Genre Lennoa

Cited by 5 publications

References 0 publications

Pollen Morphology of the Lennoaceae

Pollen Morphology of the Lennoaceae

The Structure of the Flower of Pholisma Arenarium

Parasitism in Pholisma (Lennoaceae). I. External Morphology of Subterranean Organs

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